I would like to know how do you tune a port and what hz do you tune it to?also in my trunk i can fit an sub enclosure of:37"wx18"dx15 3/4"h,how much cu.ft for 2 12"s would that give me per chamber.

PowerNaudio

09-14-2005, 03:08 PM

you tune the enclosure by increasing or decreasing the length and width of the port.
and you want to select a frequency that will help you get the flattest frequency that you can get out of the sub. if you're in to spl. then you will tune it the a frequency that will accentuate a freq that the sub plays the loudest at.

wlmrs

09-14-2005, 07:27 PM

okay my 2 subs have a freq. range of 26-1000hz.how do i know what size port to use as far as width and height and how to determine the freq. range?I'm lost.I'm trying to prevent myself from buying a pre-fab box again and actually build one to the specifications of the subs.

JimJ

09-14-2005, 07:28 PM

That frequency rating is not to be paid attention to, BTW...

SSS 18734

09-14-2005, 07:30 PM

welcome to the forums! Its good to see another Kansas Citian!

PowerNaudio

09-14-2005, 07:35 PM

well
you can use winISD to calculate the box internal volume and port configuration.

you can usre mobilede from mobile dynamics. to help you calculate the box phisical dimensions.

from the car audio help guide, link (http://www.carstereo.com/help/Articles.cfm) "carstereo.com"

the 12Volts site lots of info, link (http://www.the12volt.com/caraudio/boxes.asp) "12volts.com"